DBL datasheet DBL component DBL integrated circuit DBL schematic DBL application note BL L DBL33 DBL3 DBL. See general marking information in the device marking section on page 8 of this data sheet. DEVICE MARKING INFORMATION TSSOP− DBL Datasheet: Quad voltage comparator, DBL PDF Download Daewoo Semiconductor, DBL Datasheet PDF, Pinouts, Data Sheet, Equivalent.

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When the output voltage drops too low around 5v it stops functioning. Hi Jozef, Nice mod you did! To participate you need to register. If i short pin 4 to ground over 4k6 resistor do I still have over current protection or do i lose it?

Apparently it has an overvoltage protection circuit. ATX supplies do have a separate ferrite transformer powering the regulator microchip, in this case.

DBL339 डेटा पत्रक PDF( Datasheet डाउनलोड )

Number two died when probing the primary side while energized. These parts are run of the mill, i. Unit is on bench and have removed the 3 and 5 volt boards. Double-check the circuit you have made in step 2 and whether you have wired everything properly first. Just saying hello Started by MichaelaJoy Yesterday at 6: This website uses cookies to improve your experience.

As for the resistors, well, classic 0. Could you tell me which ones and with what parameters? Welcome to our site!

I had to, because otherwise the two psu would have had the same ground. After you are finished with step 2, this is important: Extra in-line fuse should do the job.


Modding a MHz Panasonic phone. When i try to turn on PSU with voltage set under these values it immediately stops working. You will have to disable this somehow, which is beyond me actually. And a lot of diodes, resistors, fbl339, caps and a coil in the low voltage part with 10 leads.

Came out of Cooler Master tower.

Remember that Pin 1 and 2 are inputs of the comparator and comparator itself is actually an amplifier, so your pulsation on pin 1 gets amplified and fed into the output transistors. I have Corsair TX power supply which I want to convert.

If the supply shuts down even under a light load, proceed with step 4, otherwise — add a transil or a few watt 20V Zener diode in reverse polarity across the output terminals — bravo, your regulated supply is now finished! The best part is that if i turn off the first PSU i still get the voltage from the 2nd one and vice versa, so i get either a V regulated PS or a V regulated PS.

Yes, the duty cycle control messes with both 5V and 12V lines since the half bridge is on the primary side. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

DBL339 Datasheet PDF – Daewoo Semiconductor

The solution is to power it separately from a small DC power supply. Yes, use a trimmer instead of a potentiometer, then set its resistance so the supply runs on 18 volts. First try repair it. This datadheet a real ATX to regulated supply conversion, which might come in handy for you.


If it fails to turn on, proceed with step 4. Excuse me, but I cannot understand where exactly to connect potentiometer which pin of TL It compares two input voltage levels and gives digital output to indicate the larger one. Thank you for the reply Jozef, if it works or not I will post my results.

DBL Daewoo Semiconductor, DBL Datasheet

If it tripped the breaker and burst in flames, then I hope you have read the Disclaimer datwsheet attempting this conversion, as you were instructed to do so at the main page. I would like it could start from zero volts. Nice text, thanks for sharing this with us.

Sep 27, I just desoldered VCC and grounded pin3, no need for standby 5V to pin8. But it won’t go above about I have a salvaged pc power supply I use as an adjustable bench supply. The resulting product will be a smoothly regulated ATX supply from circa 4. Then you can adjust the output down to zero. Inverting input of 1 st comparator.

Desolder always the first diode which you might meet on each line, then repeat step 3. I removed the original feedback jumper to pin 1.

Choosing Battery for Robots. Candy Yiu New Member Jun 28,